diff --git a/build.gradle b/build.gradle
index 19a37424b..198518dc8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,7 +31,7 @@ allprojects {
 
 subprojects {
     buildscript {
-        ext.kotlin_version = '1.0.5-2'
+        ext.kotlin_version = '1.0.6'
         ext.android_support_lib_version = '25.1.0'
         ext.mariotaku_commons_library_version = '0.9.11'
         ext.mariotaku_restfu_version = '0.9.34'
diff --git a/twidere/build.gradle b/twidere/build.gradle
index dc492c7c3..4e260a19f 100644
--- a/twidere/build.gradle
+++ b/twidere/build.gradle
@@ -10,8 +10,6 @@ apply plugin: 'io.fabric'
 // END Non-FOSS component
 
 buildscript {
-    ext.kotlin_version = '1.0.5-3'
-
     repositories {
         jcenter()
         // START Non-FOSS component